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Title [sv]
Adsorption av organiska molekyler till skiktsilikater
Title [en]
Adsorption of biogeochemical organics to layered minerals
Abstract [en]
Many critical environmental challenges for future generations on this planet depend on biogeochemical processes occurring in our thin soil layers. The overall aim of this research proposal is hence to increase our fundamental understanding of organic-mineral interactions - on the molecular scale. This is because improved knowledge about organic-mineral interactions and their contribution to soils overall biogeochemical functioning could lead to ways to enhance inputs for sustainable agricultural systems.To study these challenging multi-component systems, a research methodology based on a combination of molecular dynamics simulations, X-ray powder diffraction, vibrational spectroscopy, cryogenic electron microscopy and X-ray photoelectron spectroscopy is proposed.Since most terrestrial ecosystems are nitrogen limited, we focus on N-containing compounds. In the research task (year 1-2), my group will study the adsorption of small amino acids, nucleotides and common root exudates found in soils, to smectite clay minerals. This will help us unravel which type of functional groups, molecular interactions and mineral surface characteristics that govern adsorption to such mineral surfaces. In the second research task (year 3-4) we will investigate the adsorption and intercalation of poorly identified macromolecules to the smectite clay minerals, such as humics, proteins and DNA, trying to identify features common with the small model analogues used in the first research task.
Principal InvestigatorHolmboe, Michael
Coordinating organisation
Umeå University
2020-01-01 - 2023-12-31
National Category
Inorganic ChemistryTheoretical ChemistryGeochemistry
DiVA, id: project:2092Project, id: 2019-04733_VR

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